Abstract: A starter system for an internal combustion engine having a casing provided with a mounting circumferential surface adapted to be substantially closely fitted into an associated mounting bore provided in the engine or a transmission housing associated therewith, and a mounting flange extending radially from the casing and provided with a mounting end surface perpendicular to a longitudinal line of the output shaft of the starter system and spaced from the mounting circumferential surface along the longitudinal line. Because of the presence of the distance between the mounting end surface of the mounting flange and the mounting circumferential surface of the starter casing closely fitted into the mounting bore, the reaction force acting on the pinion is prevented from being amplified and transmitted to the mounting surfaces by means of an undesirable lever action.

Abstract: A novel plant growth regulator composition comprises a salt of 1,2-dihydropyridazine-3,6-dione and an ammonium alkylsulfate as an adjuvant at a molar ratio of 1/0.02 to 1/0.5.The above composition has remarkable supressing actions for sucker growth, sprouting and twing growth, and allows only a very small amount of hydrazine formation during a long preservation term. The composition can thus be safely applied to edible plants.

Abstract: A plant growth regulating composition comprising the choline salt of 6-hydroxy-3(2H)-pyridazinone and, as adjuvants, a polyoxyethylene oleyl ether and a triethanolamine alkyl-sulfate. The composition according to this invention can be prepared at a lower production cost and is easy to apply. When applied, it exhibits low toxity, and good penetration and transferability.